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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e065b7ac085847baea5a42cf37ffe618ee7122678eb3aa1f8ef2d39857370fd1' 
  AND token = '5zSPN1Z1v+o82EXcBwS3Ns+9BvLPTGibYFPT3p+Q5Os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}